Stupid Question Time

General scooter chat, any scooter related non technical info.
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Main scooter: Lambretta Li 150

Thu Aug 09, 2018 10:59 am

wrecklessrobbie wrote:
Wed Aug 08, 2018 6:27 pm

Errr never meant to upset anyone by asking here. But i presume this is the same for both Lambrettas, Vespas and any other 2 strokes.
Yes. Porting any 2 stroke will increase the power. Two strokes are unique in that they can produce an astonishing amount of power for their size, but this requires careful design of the expansion exhaust. The exhaust reflects a pressure wave that holds the air fuel mixture in the cylinder so more mixture can be forced in resulting in more power. A Grand Prix racing two stroke produced 400hp per litre, a 250cc producing close to 100hp.

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